US6961957B2 - Energy absorbing device for ballistic body armor - Google Patents

Energy absorbing device for ballistic body armor Download PDF

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Publication number
US6961957B2
US6961957B2 US10/438,445 US43844503A US6961957B2 US 6961957 B2 US6961957 B2 US 6961957B2 US 43844503 A US43844503 A US 43844503A US 6961957 B2 US6961957 B2 US 6961957B2
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US
United States
Prior art keywords
ballistic
frame
vest
panel
layers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US10/438,445
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English (en)
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US20050193480A1 (en
Inventor
Richard A. Carlson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safariland LLC
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Safari Land Ltd Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Safari Land Ltd Inc filed Critical Safari Land Ltd Inc
Assigned to SAFARI LAND LTD., INC. reassignment SAFARI LAND LTD., INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CARLSON, RICHARD A.
Priority to US10/438,445 priority Critical patent/US6961957B2/en
Priority to CA002454188A priority patent/CA2454188C/en
Priority to AU2003271348A priority patent/AU2003271348B2/en
Priority to TW092136869A priority patent/TWI243234B/zh
Priority to ES03090456T priority patent/ES2288207T3/es
Priority to EP03090456A priority patent/EP1469275B1/de
Priority to AT03090456T priority patent/ATE364163T1/de
Priority to DE60314227T priority patent/DE60314227T2/de
Priority to DK03090456T priority patent/DK1469275T3/da
Priority to SG200307772A priority patent/SG110079A1/en
Priority to NO20035847A priority patent/NO323965B1/no
Priority to JP2004069258A priority patent/JP4243559B2/ja
Publication of US20050193480A1 publication Critical patent/US20050193480A1/en
Publication of US6961957B2 publication Critical patent/US6961957B2/en
Application granted granted Critical
Assigned to WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT reassignment WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT NOTICE OF GRANT OF SECURITY INTEREST Assignors: SAFARI LAND LTD., INC.
Assigned to SAFARI LAND LTD., INC. reassignment SAFARI LAND LTD., INC. TERMINATION AND RELEASE Assignors: WACHOVIA, N.A., AS ADMINISTRATIVE AGENT
Assigned to SAFARILAND, L.L.C . reassignment SAFARILAND, L.L.C . ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAFARI LAND LTD., INC.
Assigned to SAFARILAND, LLC reassignment SAFARILAND, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAFARI LAND LTD.
Assigned to WILMINGTON TRUST, NATIONAL ASSOCIATION reassignment WILMINGTON TRUST, NATIONAL ASSOCIATION SECURITY AGREEMENT Assignors: SAFARILAND, LLC
Assigned to BANK OF AMERICA, N.A., AS AGENT reassignment BANK OF AMERICA, N.A., AS AGENT SECURITY AGREEMENT Assignors: SAFARILAND, LLC
Assigned to VIRTUS GROUP, LP reassignment VIRTUS GROUP, LP ASSIGNMENT OF INTELLECTUAL PROPERTY SECURITY AGREEMENTS Assignors: WILMINGTON TRUST, NATIONAL ASSOCIATION
Assigned to GUGGENHEIM CREDIT SERVICES, LLC reassignment GUGGENHEIM CREDIT SERVICES, LLC PATENT SECURITY INTEREST AGENT AGREEMENT Assignors: VIRTUS GROUP, LP
Assigned to SAFARILAND, LLC, MED-ENG HOLDINGS ULC, PACIFIC SAFETY PRODUCTS INC., MED-ENG, LLC reassignment SAFARILAND, LLC TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT COLLATERAL Assignors: GUGGENHEIM CREDIT SERVICES, LLC, AS AGENT
Assigned to SAFARILAND, LLC reassignment SAFARILAND, LLC RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK OF AMERICA, N.A.
Adjusted expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H1/00—Personal protection gear
    • F41H1/02—Armoured or projectile- or missile-resistant garments; Composite protection fabrics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F41H5/04—Plate construction composed of more than one layer
    • F41H5/0492—Layered armour containing hard elements, e.g. plates, spheres, rods, separated from each other, the elements being connected to a further flexible layer or being embedded in a plastics or an elastomer matrix

Definitions

  • This invention relates to protective vests, and more particularly, to body armor commonly known as a ballistic vest, which incorporates a semi-rigid frame structure attached to the ballistic package.
  • Ballistic vests have saved the lives of many law enforcement officers in recent years. As a result, law enforcement agencies have made it mandatory for their officers to wear a ballistic vest while on duty.
  • Ballistic vests have been available in recent years as a protective panel having overlying layers of a fabric made from woven high tensile strength fibers. Woven fabrics from an aramid fiber known as Kevlar, for example, have been used successfully in ballistic vests because of the high energy absorption properties of the fabric material. The material is also reasonably light in weight and flexible, which provides improved comfort when compared with previous vests which were made of metal and were therefore heavier and more rigid. The comfort of a ballistic vest is extremely important, especially to law enforcement officers, because of the heat build-up that occurs from wearing a heavy and inflexible vest for the long hours an officer is on duty. Resistance to projectile penetration is a principle factor in designing a ballistic vest; and added protective layers can offer greater protection against projectiles having the higher threat levels, but added protective layers also add undesired weight and inflexibility of the vest.
  • ballistic vests In addition to woven Kevlar fabric layers, ballistic vests have been made from other high strength fibers and composites to reduce weight and improve flexibility of the vest. However, ballistic vests using the lighter, more flexible materials also must offer the required minimum levels of protection against penetration by different types of projectiles. The more flexible the ballistic fabrics are, the more bunching and backface deformation occurs upon impact from a projectile. A vest must not be too flexible where is cannot protect the wearer.
  • Ballistic vests are regularly certified by subjecting them to ballistics testing to measure their ability to protect against different projectiles fired from different types of weapons at various angles.
  • One ballistic test commonly used in the industry is the National Institute of Justice (NIJ) Standard 0101.03 Threat Level IIIA, which, in general terms, is a high performance standard requiring that the ballistic vest prevent penetration of specified 0.44 Magnum and 9 mm rounds fired at a velocity of at least 1400 ft/sec.
  • “backface deformation” also is a required test factor in the NIJ Standard 0101.03 Threat Level IIIA certification test. Backface deformation measures the trauma level experienced by a projectile that does not penetrate the test panel. According to this test, the maximum allowable backface signature (bfs) containment for soft body armor requires a maximum allowable bfs of 44 mm for 0.44 Magnum and 9 mm rounds.
  • a problem associated with currently available concealable soft body armor ballistic vests is that when the vest is shot the ballistic package can twist or ball up potentially exposing areas of the wearer to subsequent rounds.
  • Another continuing problem of existing concealable ballistic vests is that when worn for prolonged periods of time the wearer becomes overheated or because of the flexibility of the ballistic material, the ballistic package can sag forming set wrinkles in the bottom of the carrier.
  • the present invention provides a ballistic vest of the soft body armor type preferably comprising a plurality of overlying first flexible layers arranged in a stack on a strike side of the vest, and a plurality of overlying second flexible layers arranged in a stack on a body side of the vest.
  • each first flexible layer comprises a thin, flexible, woven fabric layer made of high tensile strength polymeric fibers.
  • the individual woven fabric layers form a soft, flexible woven fabric first panel for the vest.
  • each second flexible layer comprises a thin, flexible imperforate fiber-reinforced plastic sheet comprising an array of plastic fibers embedded in a thermoplastic resinous matrix that forms each film sheet.
  • the second layers overlie each other and as a combination are referred to as a second panel of the vest.
  • the first and second panels are both located in the front and rear of the vest.
  • the vest of the present invention preferably is designed to be concealable, however it is to be understood that the inventive concepts are equally applicable to ballistic vests which are worn on the outside of the wearers' clothing or uniforms.
  • the ballistic package of the present invention is equally applicable to other types of protective garments other than vests.
  • the ballistic vest of the present invention incorporates nylon hook fasteners with rounded ends to fasten the front panel to the back panel, and are attached to stretch neoprene strapping or conventional elastic.
  • Vests, or other garments of the present invention can also use buckles, zippers and other fastening systems.
  • the ballistic vest of the present invention incorporates a frame system made of low density plastic, composite or other semi-rigid materials which is attached to the ballistic package to improve safety and performance of the vest.
  • the frame system is directly attached to the ballistic fabric material of a ballistic package in the vest.
  • the frame system distributes energy across the surface of the ballistic package, thus reducing trauma to the wearer and also improving ballistic performance of the package.
  • the frame system permits the production of lower cost and lighter weight ballistic vests.
  • the frame system offers resistance to the amount of the ballistic package travel and material twist into the center of the area of impact. The frame system thereby reduces the amount of depression or backface trauma caused by stopping the projectile. Consequently, injury caused by blunt force trauma is reduced, thereby improving safety of the vest.
  • the frame system reduces the amount of material travel, the amount of ballistic materials can be reduced, thereby providing an effective ballistic system which is lighter in weight and thickness, which improves wearer comfort and reduces the overall cost for manufacturing the vest.
  • the frame structure increases the V-50 performance of current ballistic panel configurations.
  • the frame structure is sewn on top of or in between the multiple plies of ballistic fabric contained within a ballistics package.
  • the frame supports the ballistic fabrics and acts to distribute energy in a ballistic event.
  • the frame structure is cut in a geometric form with open areas dispersed throughout the frame structure. The exact size, shape and thickness of the open areas will vary based upon the size of the ballistics panel or other factors related to each ballistic fabric or type of projectile that the ballistic vest is designed to stop.
  • the multiple plies of ballistic material to which the frame structure is attached can consist of woven or non-woven Kevlar, Spectra, Nylon or Zylon fibers, or other known ballistic materials.
  • the frame structure is positioned on the strike face side of the vest with not more than 50% of the ballistic fabric plies in front of the frame structure. Because the frame is semi-rigid, it prevents the ballistic package from sagging and allows the vest to be worn in a loose condition, thereby reducing heat build-up and improving wearer comfort.
  • the projectile strikes the ballistic materials and energy is transferred to the frame structure via the fibers in the ballistic fabrics.
  • the bullet contacts the surface, it expands, twists and becomes entangled in the fibers, and tension is put on the fibers stretched between the frame structure of the ballistic vest.
  • the frame structure being flexible offers resistance to the amount of the ballistic material travel and twist into the center area of impact.
  • the frame structure thereby reduces the amount of depression of backface trauma caused by the slowing projectile.
  • the frame structure by supporting the ballistic fabric, reduces the chance of the panel bunching or moving after a ballistic event.
  • FIG. 1 is a front view of a ballistic vest of the present invention
  • FIG. 2 is a back view of the ballistic vest of FIG. 1 ;
  • FIG. 3 is a partial cross-sectional view of the front panel of the ballistic vest of the present invention.
  • FIG. 4 is a detail of FIG. 1 illustrating the access to the ballistics penal or package
  • FIG. 5 is a front view of the ballistic package or panel incorporating a semi-rigid frame
  • FIGS. 6A–6D are front views of alternative configuration frame designs.
  • FIGS. 1 and 2 A ballistic vest 10 of the present invention is shown in FIGS. 1 and 2 .
  • the ballistic vest 10 is a concealable vest of the soft body armor type commonly worn by law enforcement officers.
  • the ballistic vest includes a front panel 12 and a rear panel 14 .
  • the front panel 12 protects the chest and stomach of the wearer while the rear panel 14 protects the back of the wearer. Both the front and rear panels protect the sides of the wearer as will be discussed in more detail below.
  • the front panel 12 may include a trapezoidal center panel 16 and hook compatible fabric located along the top 18 and sides 20 of the front panel 12 .
  • Top 18 and sides 20 provide a large area for hook fasteners 22 to secure the front panel and rear panel together around the wearer.
  • Top 18 and sides 20 allow for placement of fasteners 22 at any location to provide an optimal fit for the particular wearer.
  • Neoprene composite straps 24 located at the top and sides of the ballistic vest are attached to the fasteners 22 to secure the front and rear panels together. As seen best in FIG.
  • straps 24 for connecting the top of the front and rear panels can be typically sewn to the rear panel and or as with straps 24 located at the sides of the ballistic vest, can be inserted into a pocket 26 which includes a section of hook fasteners 28 sewn within a pocket for connection of the neoprene straps 24 .
  • the pocket arrangement for the straps 24 can be located at the top, sides or both locations of the vest.
  • the neoprene straps 24 provide for multi-directional adjustment of the straps.
  • the straps can be formed with a contoured surface to provide for additional comfort of the straps.
  • the strapping 24 is a laminated neoprene and Nylon composite which provides more adaptability and freedom of movement.
  • the neoprene composite is commercially produced by Rubatex of Santa Fe Springs, Calif.
  • Nylon can be used for the straps.
  • the front panel includes a lining material 40 which is adjacent the body 42 of the wearer and extends around the edge of the panel to the outside of the ballistic vest.
  • the material can be perforated or of solid construction and is a moisture absorbing material which wicks moisture away from the body and around to the outside of the vest for evaporation. Body moisture is transferred to provide an evaporative cooling effect.
  • the preferred moisture-absorbing material is an anti-microbial material commercially available under the trade name Microsafe by Rentex, Inc. of Montreal, Canada.
  • Contained within the lining material 40 is the ballistic panel 42 which comprises the individual layers of ballistic material 44 located within a covering layer 46 .
  • Layer 46 comprises a top layer 48 and a bottom layer 50 stitched together at internal seam 52 . Gaps are shown in FIG. 8 between lining material 40 and top and bottom layers 48 and 50 , and between layers 48 and 50 and ballistic material 44 only so that these components can be easily illustrated. It is to be understood that in the actual vest no gaps are present so that ballistic protection extends virtually from edge to edge in the front and rear panels.
  • the lining material 40 extends around to the outside surface of the vest and is sewn to the outside surface of the front and rear panels 18 and 20 to form a seam 54 which allows the ballistics package to extend all the way to the edge of the front and rear panels. As a result, the ballistics package provides more protective surfaces and thus a more protective body armor is created.
  • the front panel 12 includes an opening 56 for access to the ballistics panel 58 .
  • the opening is positioned on the outside of the front panel to produce a smooth surface against the body.
  • a zipper 60 or other suitable closing mechanism extends across the width of the opening. The zipper permits easy access to remove the ballistic panel or package.
  • the ballistic vest includes visual inspection ports 62 positioned on the exterior of the garment.
  • the visual inspection ports are located on the outside surface of the back panel. Inspection ports allows the wearer to see that the ballistic package or panel is in place without opening the garment, thus improving the level of safety.
  • the visual inspection ports are two mesh windows, or other suitable window material by which the ballistic panel can be viewed.
  • retention tails 64 and 66 are sewn to the lower edge 38 of the front and rear panels respectively.
  • the tails are constructed of stretchable fabrics or meshes which are tucked into a wearers trousers to hold the vest down during movement. Considering the fabric is made of a stretchable material, the tails improve freedom of movement while holding the vest in place when sitting or standing.
  • the ballistic vest of the present invention includes a frame 62 attached to the layers of ballistic material 44 .
  • the frame is skeletal in that it forms a structural framework for the ballistic material.
  • the frame is made of low density plastic, composite or other semi-rigid materials which is attached to the ballistic fabric layers 44 by Kevlar stitching 64 .
  • Other methods of attaching the frame to the ballistic material are contemplated by the invention, such as by gluing or laminating the frame to the materials.
  • the frame distributes energy across the surface of the ballistic panel, thereby reducing trauma to the wearer while improving ballistic performance.
  • the frame can be positioned within the multiple plies of ballistic fabric.
  • the frame is made of a semi-rigid material, the frame supports the ballistic fabric and acts to distribute energy in a ballistic event. More specifically, the frame can be cut from a piece of flexible polyethylene plastic sheet or other flexible plastic or composite.
  • the frame can be between 0.010 and 0.090 inches thick and is cut in a geometric form with a plurality of openings 66 dispersed across the surface of the frame. The exact size, shape and thickness of the openings can vary based upon the size of the ballistic panel or other factors related to the specific ballistic fabric or the type of threat level that the armor is required to meet.
  • the ballistic material can consist of woven or non-woven Kevlar, Spectra, Nylon or Zylon fibers, or any other commercially available ballistic materials.
  • the frame will be used on soft body ballistic panels weighing less than 1.59 pounds per square foot and more particularly for panels weighing less than 0.50 pounds per square foot.
  • the frame 62 is located on the strike face side of the ballistic vest and when located between the plies be positioned such that not more than 50% of the ballistic fabric plies will be on top of the frame.
  • the frame controls blunt trauma and reduces the amount of ballistic materials required to construct an effective ballistic vest, which can reduce cost, weight and thickness, thereby producing lighter and thinner ballistic vests, which also improves wearer comfort. Tests have shown that the frame can keep the projectile on the surface of the ballistic package.
  • the projectile strikes the ballistic materials and energy is transferred to the frame via the fibers in the ballistic fabric.
  • a bullet contacts the surface, it expands and becomes entangled in the fibers, and tension is put on the fibers stretched between the individual members, for example, 68 A and 68 B.
  • the frame is loaded.
  • the flexible frame offers resistance to the amount of material travel and twist into the center of the area of impact. This condition thereby reduces the amount of depression or backface trauma caused by the slowing projectile.
  • the frame reduces the chance that the ballistic panel will bunch or move after a ballistic event.
  • VO and V50 testing was performed for ballistic packages incorporating a frame as disclosed herein with the results being well within NIJ standards.
  • the ballistic packages weighed 0.39, 0.49 and 0.59 pounds per square foot and the frames were either 0.0060 or 0.0030 inches thick. 357 magnum and 9 mm projectiles were utilized.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Outer Garments And Coats (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Dampers (AREA)
  • Cable Accessories (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
US10/438,445 2003-04-15 2003-05-15 Energy absorbing device for ballistic body armor Expired - Fee Related US6961957B2 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US10/438,445 US6961957B2 (en) 2003-04-15 2003-05-15 Energy absorbing device for ballistic body armor
CA002454188A CA2454188C (en) 2003-04-15 2003-12-23 Energy absorbing device for ballistic body armor
AU2003271348A AU2003271348B2 (en) 2003-04-15 2003-12-23 Energy absorbing device for ballistic body armor
TW092136869A TWI243234B (en) 2003-04-15 2003-12-25 Energy absorbing device for ballistic body armor
ES03090456T ES2288207T3 (es) 2003-04-15 2003-12-29 Dispositivo de absorcion de energia para blindaje antibalas corporal.
EP03090456A EP1469275B1 (de) 2003-04-15 2003-12-29 Energieabsorbierende Vorrichtung für ballistischen Körperschutzanzug
AT03090456T ATE364163T1 (de) 2003-04-15 2003-12-29 Energieabsorbierende vorrichtung für ballistischen körperschutzanzug
DE60314227T DE60314227T2 (de) 2003-04-15 2003-12-29 Energieabsorbierende Vorrichtung für ballistischen Körperschutzanzug
DK03090456T DK1469275T3 (da) 2003-04-15 2003-12-29 Energiabsorberende indretning til ballistisk legemsbeskyttelse
SG200307772A SG110079A1 (en) 2003-04-15 2003-12-30 Energy absorbing device for ballistic body armor
NO20035847A NO323965B1 (no) 2003-04-15 2003-12-30 Ballistisk panel for ballistisk vest og vest med sadant ballistisk panel.
JP2004069258A JP4243559B2 (ja) 2003-04-15 2004-03-11 防弾パネルおよび防弾チョッキ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46289003P 2003-04-15 2003-04-15
US10/438,445 US6961957B2 (en) 2003-04-15 2003-05-15 Energy absorbing device for ballistic body armor

Publications (2)

Publication Number Publication Date
US20050193480A1 US20050193480A1 (en) 2005-09-08
US6961957B2 true US6961957B2 (en) 2005-11-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
US10/438,445 Expired - Fee Related US6961957B2 (en) 2003-04-15 2003-05-15 Energy absorbing device for ballistic body armor

Country Status (12)

Country Link
US (1) US6961957B2 (de)
EP (1) EP1469275B1 (de)
JP (1) JP4243559B2 (de)
AT (1) ATE364163T1 (de)
AU (1) AU2003271348B2 (de)
CA (1) CA2454188C (de)
DE (1) DE60314227T2 (de)
DK (1) DK1469275T3 (de)
ES (1) ES2288207T3 (de)
NO (1) NO323965B1 (de)
SG (1) SG110079A1 (de)
TW (1) TWI243234B (de)

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CN104223470B (zh) * 2014-09-15 2016-05-18 广州卫富科技开发有限公司 一种安保防护服
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DE60314227D1 (de) 2007-07-19
JP2004317113A (ja) 2004-11-11
CA2454188A1 (en) 2004-10-15
TW200420866A (en) 2004-10-16
EP1469275B1 (de) 2007-06-06
AU2003271348A1 (en) 2004-11-04
DE60314227T2 (de) 2008-01-31
EP1469275A1 (de) 2004-10-20
NO20035847L (no) 2004-10-18
ES2288207T3 (es) 2008-01-01
DK1469275T3 (da) 2007-10-08
JP4243559B2 (ja) 2009-03-25
NO323965B1 (no) 2007-07-23
CA2454188C (en) 2007-03-20
SG110079A1 (en) 2005-04-28
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TWI243234B (en) 2005-11-11
US20050193480A1 (en) 2005-09-08

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